Plug meter



FIG. 1 is a front and left side perspective view of a plug meter showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom view thereof; and,

FIG. 8 is a front and right side perspective view of the plug meter.

The broken lines in the drawings are used to show portions of the plug meter that do not form part of the claimed design. 

The ornamental design for a plug meter, as shown and described. 